A lot of mothers on SR did everything they could to help their addict son/daughter and the whole thing exploded in their face. Most will tell you that letting go is the best way for the addict to find sobriety. When the addict no longer have people handing them money, sheltering them, getting them out of jail, paying for expensive rehabs and program... the sooner they will face the consequences of their actions and choices. As long as you *help* them, you enable them to use and send along the message that "there's no consequences because someone will always be there to clean up the mess." Bad idea.
I encourage you to read the stories of some of the moms here and hope you find some guidance.